Last updated: 25 July 2026
Repainting a weatherboard house is 60–70% preparation: washing, scraping, sanding, filling and priming before a single topcoat goes on. Melbourne’s summer UV index of 12–13 and rapid temperature swings work weatherboards harder than almost any other cladding, so the prep is what decides whether the finish lasts 10–15 years or three. This guide walks through the full process, board by board. If you would rather have it done for you, see our weatherboard house painting in Melbourne service.
Key takeaway
Peeling paint on weatherboard is a warning sign, not just an eyesore: the paint film is the timber's only shield against rain and UV. Repaint before the timber suffers and the job stays a paint job instead of becoming a carpentry job.
How do you know your weatherboards need repainting?
Four failure signs tell the story: chalking, alligatoring, peeling and bubbling. When more than 20–30% of the home shows them, it is time for a full repaint.
- Chalking: a fine, powdery residue that rubs off on your hand
- Alligatoring: spiderweb or crocodile-skin cracking in the paint film
- Peeling or flaking: paint lifting off the timber, worst on sun-exposed walls
- Bubbling: blisters under the paint surface that signal trapped moisture
Below that 20–30% threshold, a touch-up of the affected elevation can buy years. Above it, patching becomes false economy because the rest of the film is close behind.
Should you repaint or replace weatherboards?
Repaint if the boards are sound. Even severely peeled weatherboard comes back with proper scraping, sanding and priming, and any individual rotten or split boards are simply replaced during preparation. Board-by-board replacement is a normal part of a repaint quote, a carpenter or the painting crew swaps the failed boards before priming.
Full recladding is a different animal: a carpentry project costing several times a full repaint, and only worth it when rot is widespread across whole elevations or the boards have been patched beyond saving. If you are unsure which side of the line your home sits on, get a painter to inspect before pricing new cladding, most “tired” weatherboard is structurally fine under the failed paint.
Do you need to test for lead paint first?
Yes, on any home built before 1978. Stable lead paint is generally safe to live with, but sanding it creates fine toxic dust that is hazardous to children and pets. DIY test kits like 3M LeadCheck swabs are cheap and simple: cut into the paint layers, apply the swab, and a red tip means lead. See EPA Victoria’s lead guidance for more.
If lead paint is detected
Dry-sanding must not be used. Safe removal means wet-sanding (water keeps dust out of the air), containment of all debris, and safe disposal. A licensed professional with lead experience is strongly recommended, see our lead paint removal service.
How do you prep a weatherboard house for painting?
Four stages, in order: wash, scrape, sand, fill. This is 60–70% of the job and it is what separates a 10-year finish from a 2-year failure.
- Wash the entire house. Grime, mould and cobwebs stop paint bonding. You cannot paint over dirt.
- Scrape all loose and peeling paint. Paint over an unstable base and the new coat falls off with the old one.
- Sand the whole surface. Light scuffing creates a “key” the primer physically grips. Use 80-grit to cut back flaking edges and weathered timber, then 120-grit to feather the edges of sound paint into bare patches. An orbital sander handles the flat faces; a sanding block does edges and grooves.
- Fill every gap, crack and nail hole. Every gap is a rainwater entry point that leads to rot. Flexible exterior sealant keeps the shield continuous.
Which primer goes on weatherboards?
Bare or scraped-back timber gets a penetrating primer-sealer like Dulux 1 Step; sound previously painted boards just need a light sand and an exterior undercoat. Matching the primer to the surface is what prevents flaking and patchy colour later.
- Tannin-prone timber (cedar, some hardwoods) and knots: an oil-based or stain-blocking primer stops stains bleeding through
- Bare metal (nail heads, flashings): spot-prime with metal primer so rust does not bleed into the finish
Primer matters because bare timber drinks paint like a sponge. Unprimed boards give a patchy finish and soak up far more expensive topcoat; a sealed surface can cut topcoat absorption by up to half. Our paint and primer guide covers the primer-vs-undercoat decision in full.
What paint and how many coats?
Two topcoats of a premium exterior acrylic like Dulux Weathershield, never one. The first coat soaks in unevenly and provides colour but not protection. The second builds the thick, flexible film that expands and contracts with the timber through Melbourne’s temperature swings without cracking. Premium exterior paints also carry fungicides for mould on damp, shaded southern walls.
The fastest professional method is spray application followed by back-brushing, working the sprayed paint into the timber grain by brush for a stronger bond. Brush-and-roll is slower but the sensible choice on windy days or tight boundaries. Either way, the paint is the same; the speed difference is in the application.
What colours suit a weatherboard house?
Weatherboard carries both heritage and modern schemes well: soft whites and creams with contrast trim for period homes, deep greys and greens like Monument or sage for a current look. The fixed elements pick the palette for you, roof colour, brick, and window frames all have to sit comfortably with the boards.
Test before committing: paint A4-sized cards in your shortlisted colours, tape one to the sunny north side and one to the shaded south side, and check them morning, midday and late afternoon. A grey that looks perfect in full sun can read cold and purple in shade; a warm white can read cream on one wall and stark white on another. For specific directions we see working across Melbourne, see our Monument colour guide and sage green guide.
How much does weatherboard house painting cost in Melbourne?
$10,000–$18,000 for a standard single-storey weatherboard, up to $35,000 for a two-storey heritage home, at 2026 Melbourne rates. The three cost drivers are size, paint condition (worse condition = more prep hours), and access (scaffolding on two-storey homes).
| Home type | Indicative cost | Typical timeline | Key cost driver |
|---|---|---|---|
| Single storey (standard) | $12,000–$16,000 | 1.5–2 weeks | Preparation volume |
| Single storey (heritage) | $15,000–$25,000 | 2–3 weeks | Ornate details, lead paint, multi-colour |
| Two storey (standard) | $16,000–$22,000 | 2–3 weeks | Scaffolding + surface area |
| Two storey (heritage) | $20,000–$35,000 | 3–4 weeks | Scaffolding, heritage details, lead paint |
| Partial repaint (1–2 elevations) | $4,000–$8,000 | 3–5 days | Limited scope |
Prices are indicative 2026 Melbourne rates including labour, preparation and two coats of premium exterior paint; scaffolding is additional unless specified. Always get at least two written, itemised quotes, a cheap quote on weatherboard almost always means prep hours have been cut, and prep is the whole game. For how this fits into whole-house budgets, see the house painting cost guide, or our weatherboard painting service for a fixed price on your place.